The first step: 1-7 days Monocytes will be isolated from peripheral blood of patients. The monocytes obtained will be then incubated in fresh serum-free AIM-V medium (Gibco) containing 800U/ml of GM-CSF and 400U/ml of IL-4 (Peprotech) for 5 days. After 5 days of culture in vitro, The DCs induced will be cultured with a commercially available hepatitis B vaccine containing 10 ug of HBsAg (GSK) for 2 days.